【摘要】 针对现有三级式同步起动/发电机转子初始位置检测方法在检测过程中可能会使转子发生转动,对硬件要求高,检测误差大等问题,依据旋转变压器的理论,研究了基于"主电机注入-主励磁机检测"的转子初始位置检测方法,并给出了推导过程。该方法在主电机定子侧注入旋转高频电压信号,检测主励磁机定子侧的高频电流响应信号,通过对电流信号进行滤波,坐标变换与锁相环跟踪等处理,即可获得转子初始位置。实验结果表明,该方法不会使转子发生转动,也不需要知道电机的参数,硬件结构简单。检测误差在2°电角度以内,能够满足三级式同步电机的平稳起动要求。更多还原

【Abstract】 Aiming at the problems that,possibility of rotor rotating during estimation process,high demand for hardware and poor estimation precision of present initial rotor position estimation methods for three-stage synchronous starter/generator,according to the working principle of rotory transformer,an initial rotor position estimation method which is based on"injecting at main machine,detecting at main exciter"was analyzed,and the derivation process was given. By injecting rotating high frequency voltage into main machine’s stator,the initial rotor position was derived from main exciter’s stator current after filtering,coordinate transformation and phase-locked loop tracking. Experimental results show that the proposed method can keep rotor standstill,machine parameters and extra hardwares are not needed. The estimation error is below 2° electrical angle,which satisfies three-stage synchronous machines’ need for smooth startup.更多还原